and MORE pain

I figured out why I'd been feeling rather crappy last week. Dentist discovered an infected tooth. No decay, xray was clean. He found it with an iced q-tip, and we were all thinking it was a different tooth, but there was no reaction. As soon as he hit the molar, I about flew out of the chair. Two injections later I was still not able to tolerate the drill. He managed to drain it a little and vacuum out some of the goo, but I was getting to where I was afraid of the drill, afraid I would feel the pain that kept occurring.

What the heck am I going to do during the root canal? My prior r/c experience was not exactly pleasant.